What is the most commonly used sensor in IoT applications?

Environmental, motion, opto/image, and health-monitoring sensors are some of the most used sensor types in IoT applications

By
Gina Roos, editor-in-chief

Sensors are one of the most important
components used in internet of things (IoT) applications, collecting critical
data in a range of end products from drones and automobiles to wearables and
AR/VR headsets. According to a survey of 1,042 engineers of IoT solutions in 51
countries, conducted by Newark element14, environmental sensors are the most commonly used in
IoT applications.

Environmental sensors, including those
that measure temperature, humidity, and pressure, are most often used in IoT designs,
according to 38% of survey respondents. This is followed by motion sensors
(25%), opto/image sensors (19%), health-monitoring sensors (8%), and audio
sensors (4%).

The survey also reveals a growing role
of hardware early in the design process so that engineers can test their designs
and quickly develop a proof of concept. The survey finds that 50% of
developers use single-board computers such as Raspberry
Pi and BeagleBone Black because they are ready-to-use embedded
development platforms, said Newark element14. Yet 27% of developers prefer
to use personal designs, while 19% use development platforms provided by
silicon vendors. (See related article: Comparing
prototype platforms: Arduino, Raspberry Pi, BeagleBone, and LaunchPad)

Most developers (58%)
prefer to design a complete solution for edge-to-cloud security themselves
instead of relying on third-party solution providers, which could add some
additional costs. However, some survey
respondents said that they use third-party providers for edge-to-cloud communications
(21%), designing edge devices (18%), and for data center/analytics (18%).

The most preferred connectivity protocol
between edge devices and the cloud is Wi-Fi (66%), according to survey
respondents. Newark element14 attributes this to Wi-Fi’s long-range
connectivity, higher throughput, and the latest low-power microprocessors with
integrated Wi-Fi on the chip. The second most popular communications protocol
is cellular — 4G/LTE (31%), followed by Bluetooth Low Energy (27%), LoRa (11%)
and sub-1 GHz (7%).

Security, security, securityWhen asked what is the
most important aspect to consider when developing IoT solutions, the answer
was security. Fifty-two percent of respondents are most concerned about data
security, data privacy, and data protection, while 24% are worried about
the communications reliability. Big concerns drop off to edge-device reliability
(9%), ease of data review/analysis (8%), and ecosystem (7%).

The survey also finds
that security is the biggest concern. Forty percent of respondents said that security is their biggest concern for IoT design due to the data collected from
both machines and humans. Other big worries are connectivity (26%) and interoperability
(25%).

Engineers also believe that the
biggest opportunities for IoT over the next five years are in the automation space
— home automation (27%) and industrial automation & control (20%). Artificial
intelligence and smart city segments are tied at 12%, followed by energy
management (11%), transportation (8%), and wearables (7%).

The one big factor that
will accelerate the benefits of IoT is interoperability (certified standards), according to 36% of respondents. Other top drivers include ease of
development (28%), connectivity standards (28%), need for open standards (27%),
need for data privacy policy (23%), adoption by public sector (16%), and energy
consumption (12%). Click herefor the
complete survey results.

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